\documentclass{letter}
\begin{document}
\address{10 Downing Street,\\London}
\signature{Tony}
\begin{letter}{President George W.\ Bush\\The White House\\Washington DC}
\opening{Dear Master,}

Please please please please please please please let me join in your war!

\closing{Yours beggingly,}
\end{letter}
\begin{letter}{Director General\\The BBC\\London}
\opening{Dear bootlicker,}

I have now decreed that ``Sunday'' is to be renamed ``Tonyday.''  See
to it.

\closing{Obey me or else,}
\ps{P.S. You must not mention my \pounds1,000,000 salary increase on any news
bulletin.}
\end{letter}
\end{document}

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